162 lines
4.6 KiB
C
162 lines
4.6 KiB
C
/****************************************************************************
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* net/local/local_conn.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#if defined(CONFIG_NET) && defined(CONFIG_NET_LOCAL)
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <queue.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include "local/local.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: local_initialize
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*
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* Description:
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* Initialize the local, Unix domain connection structures. Called once
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* and only from the common network initialization logic.
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*
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****************************************************************************/
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void local_initialize(void)
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{
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#ifdef CONFIG_NET_LOCAL_STREAM
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dq_init(&g_local_listeners);
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#endif
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}
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/****************************************************************************
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* Name: local_nextconn
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*
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* Description:
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* Traverse the list of listened local connections
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*
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* Assumptions:
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* This function must be called with the network locked.
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*
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****************************************************************************/
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FAR struct local_conn_s *local_nextconn(FAR struct local_conn_s *conn)
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{
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#ifdef CONFIG_NET_LOCAL_STREAM
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if (!conn)
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{
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return (FAR struct local_conn_s *)g_local_listeners.head;
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}
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else
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{
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return (FAR struct local_conn_s *)conn->lc_node.flink;
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}
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#else
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return NULL;
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#endif
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}
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/****************************************************************************
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* Name: local_alloc()
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*
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* Description:
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* Allocate a new, uninitialized Unix domain socket connection structure.
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* This is normally something done by the implementation of the socket()
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* API
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*
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****************************************************************************/
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FAR struct local_conn_s *local_alloc(void)
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{
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FAR struct local_conn_s *conn =
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(FAR struct local_conn_s *)kmm_zalloc(sizeof(struct local_conn_s));
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if (conn != NULL)
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{
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/* Initialize non-zero elements the new connection structure. Since
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* Since the memory was allocated with kmm_zalloc(), it is not
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* necessary to zerio-ize any structure elements.
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*/
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#ifdef CONFIG_NET_LOCAL_STREAM
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/* This semaphore is used for signaling and, hence, should not have
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* priority inheritance enabled.
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*/
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nxsem_init(&conn->lc_waitsem, 0, 0);
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nxsem_set_protocol(&conn->lc_waitsem, SEM_PRIO_NONE);
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#endif
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}
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return conn;
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}
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/****************************************************************************
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* Name: local_free()
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*
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* Description:
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* Free a packet Unix domain connection structure that is no longer in use.
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* This should be done by the implementation of close().
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*
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****************************************************************************/
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void local_free(FAR struct local_conn_s *conn)
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{
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DEBUGASSERT(conn != NULL);
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/* Make sure that the read-only FIFO is closed */
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if (conn->lc_infile.f_inode != NULL)
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{
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file_close(&conn->lc_infile);
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conn->lc_infile.f_inode = NULL;
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}
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/* Make sure that the write-only FIFO is closed */
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if (conn->lc_outfile.f_inode != NULL)
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{
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file_close(&conn->lc_outfile);
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conn->lc_outfile.f_inode = NULL;
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}
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#ifdef CONFIG_NET_LOCAL_STREAM
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/* Destroy all FIFOs associted with the connection */
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local_release_fifos(conn);
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nxsem_destroy(&conn->lc_waitsem);
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#endif
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/* And free the connection structure */
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kmm_free(conn);
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}
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#endif /* CONFIG_NET && CONFIG_NET_LOCAL */
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